Circulating vent control



March 16, 1937. H. A. PHAIL CIRCULATING VENT CONTROL Filed Dec. 31, 1935 INVENTOR.

ATTORNEY.

Patented Mar. 16, 1937 UNITED STATES act on PATENT OFFIE CIRCULATING VENT CONTROL Herman. A. Phail, River Rouge, Mich.

Application December 31, 1935, Serial No. 56,967

5 Claims.

My invention relates to a new and useful improvement in a circulating vent control adapted for use primarily in connection with a warm air heating and ventilating system although from o the description of the invention it will be obvious nate static or pressure in rooms, chamber, buildings or the like so that a free and proper circulation of air may always be obtained Another object of the invention is the provision of a vent of this class so constructed that the heating in a room or chamber by warm air may be facilitated and circulation sufiiciently increased so as to augment the efficiency of the heating device.

Another object of the invention is the provision of a vent having control shutters so mounted that they will easily and quickly swing to open and closed position in response to the development of any unbalance on opposite sides of the vent.

Another object of the invention is the provision of a circulating'vent of this class so constructed and arranged that it may be easily and quickly 0 regulated to permit its movement to open position or to lock thesame in closed position.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter described and 5 claimed.

The invention will be best understood by a reference to the accompanying drawing which forms a part of this specification, and in which,

Fig. 1 is a sectional view taken on line ll of Fig. 215 a rear elevational view of the invention.

Fig. 3 is a fragmentary sectional view taken on line 3--3 of Fig. 2. V

Fig. 4 is a fragmentary view taken on line 4-4 5 of Fig. 2. i

Fig. 5 is a fragmentary view taken on line 5-5 of Fig. 4.

As shown in the drawing, the invention comprises a plate 7 having openings 8 formed therein 0 to provide a grid. Projecting rearwardly at the sides of this plate are the flanges 9 and l B which engage against the supporting wall H to which the device is attached by screws I2 to form a covering for the opening [3 formed in the Wall H.

5 A flange l4, similar to the flanges 9 and II], projects rearwardly from the top of the plate and a plate l5 of considerably less width than the flange Hi projects rearwardly from the base of the plate. Secured to the inner surface of the plate 1 and extending longitudinally thereof, adjacent the bottom thereof, is an angle iron I6. Extending parallel to the angle iron l6 and secured to the inner surface of the plate l, adjacent its upper end, is an angle iron ll. Projecting .through these angle irons l6 and I? at spaced intervals are pins l8 the lower ends of which rest upon the upper face of the inturned flange I5. Each of these pins I8 extends through and is fixedly secured to a knuckle l9 formed on the shutter blade 20. These shutter blades are made to overlap each other as clearly shown in Fig. 1 in closed position, and are adapted to swing in open position as shown in dotted lines in Fig. 1.

.These, shutter blades aremade from very light material so that they will swing on their axes of pivot as soon as there is any unbalance established on opposite sides of the plate I. In order to accomplish this the shutter blades are made from very thin sheet metal, and in order to reenforce these blades and prevent their undue bending or distortion there is pressed centrally out from each blade the panel 2!.

Formed in the flange I4 is a slot 22 through which extends one end of the link or bar 23 which is pivoted intermediate its ends on the pivot 24 projected through the lug 25 which is fastened on the surface of the flange l4. Projected through an opening formed in the lower end of the link or bar 23 is a wire, one end 25 of which extends outwardly from the link 23 from one face of the inner end of the link and the other end 26 of which extends outwardly from the opposite face of the link. The ends of this wire are angularly turned as at 21 and extended through an opening formed in a bar 28 which is downwardly offset and angularly turned to provide the arm 29. This arm 29 is pivotally connected to the angle iron 30 which serves as a presser bar and may, upon a rocking of the link 23, be brought into engagement with the shutter blades when the same are in closed position. The presser bar 39 is shown in closing position in Fig. 3 and in Fig. 4 and Fig. 5 the link 23 is rocked on its pivot so that the presser bar 30 is moved outwardly to permit the shutter blades to swing to open position. It will be noted that the bar 30 is disconnected from the shutter blades and merely serves as a presser member to maintain these shutter blades in closing position. Thus, when the shutter bladesare moved. outwardly to inoperative position as shown in Fig. 4 or Fig. 5, no interference is had with the shutter blades in their movement to open or closed positions. The presser bar 30 has a double movement in its operation. In moving into position to close the shutters, this bar 30 moves toward the grid frame or plate I and also moves longitudinally of its length. This affords a means for controlling the circulation of air through the vent while at the same time a device is provided which will permit the opening or closing of the vent automatically upon the development of any unbalance at opposite sides of the venting device.

This will afford a means for relieving all static air pressure from rooms and prevent other pressure from coming up through the ducts on which the device may be placed, so that air can not flow from one room into another. In other words, the device when placed on a vent duct will permit air to pass through the duct only when it is passing from the room which the device is intended to ventilate. Thus, if air should be transferred from one room to a reception chamber, the air so transferred could not come up the venting tube of another room as the shutters would swing closed automatically and prevent such travel. Consequently, the only air which is permitted to enter the rooms must come through the regular delivery ducts in which case the air will generally be cleaned and treated.

While I have illustrated and described the preferred form of construction, I do not wish to limit myself to the precise details of structure shown, but desire to avail myself of such variations and modifications as may come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A device of the class described, comprising: a grid plate having a plurality of openings formed therein; a pair of angle irons, one mounted on.

the rear face of said plate and extending parallel and adjacent to its top edge and the other mounted on the rear face of said plate and extending parallel and adjacent to its bottom edge; a plurality of shutters; and a knuckle formed on one edge of each of said shutters; and a pintle projecting beyond opposite ends thereof, the projected ends of said pintles extending through said angle irons for swingably mounting said shutters thereon, said plate being provided on its lower edge with a rearwardly projecting flange, the ends of said pintles after projecting through the lower of said angle irons resting upon the upper surface of said flange.

2. A device of the class described, comprising: a grid plate having a plurality of openings formed therein; a pair of angle irons, one mounted on the rear face of said plate and extending parallel and adjacent to its top edge and the other mounted on the rear face of said plate and extending parallel and adjacent to its bottom edge; a plurality of shutters; a knuckle formed on one edge of each of said shutters; and a pintle projecting beyond opposite ends thereof, the projected ends of said pintles extending through said angle irons for swingably mounting said shutters thereon, said plate being provided on its lower edge with a rearwardly projecting flange, the ends of said pintles after projecting through the lower of said angle irons resting upon the upper surface of said flange, the points of projection of said pintles through said upper angle iron and said lower angle iron being out of vertical alignment to retain said pintles inclined to the vertical.

3. A device of the class described, comprising a grid plate having a plurality of openings formed therein; a plurality of swingably mounted shutters adapted for swinging, when in closed position, into overlapping relation for forming a closure for said plate; means for mounting said shutters on said plate for free swingable movement into open and closed position; a presser bar for moving into engagement with said shutters and retaining the same in closed position; a rearwardly extending flange on the upper edge of said plate; and means mounted on said flange for actuating said presser bar and moving the same into and out of engagement with said shutters.

4. A device of the class described, comprising: a grid plate having a plurality of openings formed therein; a pair of spaced rails mounted on the inner face of said plate, one adjacent the bottom thereof and the other adjacent the top thereof, said rails extending parallel to the top and bottom of said plate; a plurality of shutters adapted upon swinging into closed position for overlying each other and providing a closure for said plate; means for swingably mounting said shutters between said rails for free swingable movement into open and closed position; a bar swingably mounted at one of its ends to the upper of said rails, said bar being downwardly offset and angularly turned, intermediate its ends; a presser bar mounted on the opposite end of said bar, said presser bar being movable into and out of engagement upon swinging of said swingably mounted bar; a rearwardly extending flange on the upper edge of said plate; a link pivotally mounted, intermediate its ends, on said flange; and means cooperating with said link for effecting a swingable movement of said swingable bar, said presser bar upon engagement of said shutters when in closed position effecting a retaining of the same in closed position.

5. A device of the class described, comprising: a grid plate having a plurality of openings formed therein; a plurality of shutters swingably mounted on said grid plate and adapted when moved to closing position for overlying each other and serving as a closure for said plate; means for mounting said shutters on said plate for free swingable movement into open and closed position; a presser bar for moving into engagement with said shutters and retaining the same in closed position; means for mounting said presser bar on said plate in parallel relation thereto and for movement while in parallel relation to said plate toward and away from said plate; and means mounted on said plate'for actuating said presser bar and moving the same into and out of engagement with said shutters and simultaneously longitudinally of its length.

HERMAN A. PHAIL. 

